Lina L, Parhusip HP, Gea ELD, Purwati AA. Pengaruh Disiplin Kerja Dan Motivasi Terhadap Produktivitas Kerja Karyawan Sippin Medan. MSEJ [Internet]. 2023Jul.17 [cited 2025Aug.26];4(4):4509-16. Available from: https://journal.yrpipku.com/index.php/msej/article/view/2671